Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: April 1, 2009
Publication Date: August 16, 2009
Citation: 1. Gao, S., R. Qin, B. Hanson, D. Wang, and S. Yates. 2009. Development of practices for minimizing emissions from soil fumigation using field plot tests. 238th American Chemical Society National Meeting & Exposition, August 16—20, 2009, Washington DC. Abstract no. AGRO 243. Technical Abstract: Emission reduction is essential to minimize the potentially negative impact on air quality from soil fumigation. To develop practices for minimizing emissions, studies were conducted using field plot tests following similar operation procedures as in growers’ fields. Fumigant emissions were measured using flux chamber methods with either static (passive) or dynamic (active) chambers. Constructed dynamic flux chamber systems (DFCs) allow continuous and auto-sampling features that have made it possible to collect data on emission flux changes and cumulative emission losses over time. Compared to a large field-scaled emission trial, which requires on- or off-site monitoring and computer modeling to estimate emissions, flux chamber methods have the advantage of reduced costs and providing replicate data for a treatment. Compared to laboratory column studies, the field data were helpful to conclude the effectiveness of various surface sealing techniques and treatments on emission reductions in field conditions. These surface treatments include plastic tarping, irrigation and surface soil amendment (e.g., with organic materials).